I assume this is a market-research type question. FYI, I'm 20+-3 years old. Almost everything I need to know is available online. Knowing the speed of light is

I assume this is a market-research type question. FYI, I'm 20+-3 years old. Almost everything I need to know is available online. Knowing the speed of light is useful, but if I forget it google can remind me. Good memory is useful, but not nearly as useful as it was 30 years ago. There are also good tools online for memorising facts by brute force -- for example, I use Anki to learn formulae. Regards the wetware brain, the only real issue I have is names. I can't remember them to save my life, and it'll be a few years before technology allows me to offload that function.